See also: Rose tree (homonymy)
The rose trees , or wild roses , are a kind of Plante S of the family of the Rosacée S, originating in the moderate and subtropical areas of the northern hemisphere. They are Arbuste S and Arbrisseau X sarmentous and thorny. According to the often various opinions of the botanists, the kind Rosa includes/understands from 100 to 200 Espèce S which are hybrident easily between them.
Several species and of many Cultivar S, resulting from changes or crossings, are cultivated like decorative plants for their Fleur S, the pink S. Those constitute the most important category of the cut Fleurs, sold at the Fleuriste S, but the rose trees are also cultivated for the production of gasoline of Parfum ery.
The plants of the kind Rosa are Arbuste S or small Arbrisseau X thorny with the drawn up port, climbing and sometimes crawling, in general reaching two to five meters in height. Rosa ×odorata nothovar. gigantea can however reach 15 meters in height in its surface of origin (Burma) and 10 meters in culture in moderated climate, while dwarf species, such Rosa minutifolia do not exceed 75 cm in height.
The principal modification observed at the cultivated rose trees is the multiplication of the petals, which are in fact of transformed cheesecloths.
These plants appeared there are forty million years (Oligocène) what is attested by the presence of Fossile S of one species close to Rosa nutkana found in the Oregon (the United States).
The distribution of the various sections of the kind Rosa is not homogeneous. That which with the vastest distribution is the section of the Cinnamomeae : it is present in the three continents (Asia, Europe, America) except in the extreme west of Europe. It is also that which has greatest variability and for this reason probably had a central role in the evolution of the kind.
The oldest species would be Rosa beggeriana , Rosa berberifolia ( Rosa simplicifolia , gold yellow) and Rosa spinossissima . It is of Rosa beggeriana that would have derived Rosa canina , Rosa acicularis and its variety girl Rosa alpina which are themselves very old. Rosa beggeriana and Rosa berberifolia always cohabits in the Xinjiang in China.
The indigenous species of Europe are, in the actual position of our knowledge, Rosa canina , Rosa rubiginosa , Rosa villosa , Rosa arvensis and Rosa pimpinellifolia `spinosissima'.
The most recent species, most advanced with their styles welded in column, are those of the section of the Synstylae . However, from a phylogenetic point of view, this section, whose distribution is characterized by surfaces disjoined in Asia, Europe and North America, could artificially gather specialized forms of other sections.
Among the diploïdes (14 chromosomes) one finds Rosa arvensis, Rosa banksiae, Rosa blanda, Rosa bracteata, Rosa brunonii, Rosa chinensis, Rosa filipes, Rosa foliolosa, Rosa hugonis, Rosa laevigata, Rosa moschata, Rosa will multiflora, Rosa nitida, Rosa odorata, Rosa palustris, Rosa roxburghii, Rosa rugosa, Rosa will setigera, Rosa wichuraiana, Rosa woodsii, Rosa xanthina , as well as the species of the section of the '' Synstylae ''.
Among the Polyploid S,
At certain complex species, one finds various levels of ploïdie:
At the Caninae , the Méiose is particular, because the Pollen, whatever the level of Ploïdie of the relative donor, transmits only seven chromosomes, which gives to the descent a resemblance to the plant-mother, this one being all the more large as the level of ploïdie is high. One attends the constitution thus, not far from the stool of a “micro population” of rather homogeneous appearance.
The kind Rosa was described for the first time by Linné in its Species Plantarum , volume 1, page 491, published with Stockholm on May 1st, 1753. The standard species described is Rosa cinnamomea L. being first reference published for this generic name, it is preserved for all the posterior denominations. Hereafter the chronological list of the synonymous with Rosa , with the references of their publication:
The kind Rosa is divided into four unequal sub-genera, of which three include/understand only one or two species, and the fourth, Eurosa , all the others.
; Pimpinellifoliae
See also: List of the species of the kind Rosa
See also: Rose (flower)
Designation of the cultivated rose trees
The cultivated rose trees are generally Cultivar S created by rosierists and more rarely of the forms (species or varieties) natural.
For these last, called “botanical rose trees”, official designation follows the regulations of the international Code of botanical nomenclature. The name of a species is a binomial Nom in which the first term starting with a capital letter indicates the kind, and second all into tiny is the specific adjective, the whole expressed in Latin botany and written in Italic characters. This binomial is followed abbreviation of the name of the author, often essential precision in the case of the synonymous rose trees being given the big number of met. Example: Rosa gallica L.
In the case of the cultivars, they are the provisions of the international Code of nomenclature of the crop plants which apply. Those force to use a name of variety written in a living language and not in Latin (although for certain varieties old Latin was used) and written in Roman character placed between Guillemet S simple and starting with a capital letter. Example: `To remember Malmaison'.
They were initially named by a botanical characteristic (sparkling wine), by the shape of the pinks (pompom, punt, out of cut, reflex, with districts, imbricated, globulous, turbinate), according to the place of their discovery (Bourbon…), the name of the “discoverer” (Hazel nut, Portland cement) or the name of the species or the hybrid from which they resulted (Hybride of the). One thus defined classes of rose trees which characterize a particular type of flowers, and which are always of everyday usage. But this system of classification showed its limits when it was a question of classifying hybrids which one can attach to 2,3 or 4 categories.
The Clause guide of 1952 classified already the varieties as dwarves with large flowers and small flowers, bushes, stems, climbing and whining, then when it is question of the “best varieties”, it is a classification between climbing tonics and not tonics by color, and others that climbing, there too tonics and not tonics by color. On the hundred quoted rose trees, one notes like cultivated still much `Mrs Meilland' and the majority of climbing (`Mrs Alfred Carrière', `Gloire of Dijon', `Dorothy Perkins', `American Pilar', `Albertine' and climbing them of `Mrs Meilland', `Caroline Testout', `Souvenir Claudius Pernet'…)
It was initially proposed to divide pinks wild or botanical, pink old (before 1867) and modern pinks, then according to visible characteristics: tonic/not tonic, climbing/others (floor covering, shrubs, bushes), flowers grouped/large flowers, etc In 1971, the world Fédération of the companies of pinks ( World Federation off Pink Societies ) reclassified the old and modern rose trees in several groups defined by their port and thus by their possible uses in the gardens
The american company of the pinks ( American Pink Society ) adopted a detailed classification of the horticultural varieties, based on genealogical” and historical considerations “and generally used in the United States. It includes/understands three principal groups: botanical species wild rose trees), old pinks (before 1867) and modern pinks. The old pinks were subdivided in 21 classes and the modern pinks in 13 classes.
See also: Culture of the rose trees
The culture of the rose trees is an activity spread in many countries is in a professional framework: by the obtenteurs creating of new cultivars, by the nursery gardeners producing of the cut flowers or the seedlings of rose trees for the gardens, by the owners of public gardens (often of the dedicated services of the communities), that is to say within a framework deprived by all the private individuals having a Pleasure garden in which the rose tree is certainly the most popular Plante of the ornament.
The general terms necessary for the culture of the rose trees are:
It can be carried out by Greffage, suckering, Bouturage, Semis and multiplication In vitro. Sowing is impossible to circumvent for the production of new varieties by Hybridation, on the other hand, the hybrids are generally reproduced by grafting, mode of vegetative Multiplication which preserves the phenotypical characters (it is a cloning) and which makes it possible to choose a Porte-greffe adapted better to the later conditions of culture. The gardener amateur can multiply certain rose trees by propagation by cutting or taking away of Drageon S.
The new varieties are often protected by certificates from vegetable obtaining (COV) or by registered trademarks, even both, the legal origin of the seedlings being guaranteed by official labels carrying the name of variety deposited and the trade mark followed by the signe ®.
The multiplication of the rose trees is primarily the fact of the specialized nursery gardeners. The understocks are ecotype S of Rosa canina and Rosa rubiginosa which has the disadvantage of suckering much, or Rosa indica major which suckers little and Rosa coriifolia " frœbelii" who does not sucker.
The plantation is carried out in autumn and winter (from November to March in the northern hemisphere), in a quite battered ground then rested, in a sufficient cavity so that the roots are at ease and the point of Clerc's Office (or the collet for the not grafted rose trees) very slightly buried. A watering ensures the compressing of the ground. These rose trees must then be sprinkled regularly the first year and the foot mulched to protect them from the cold in winter.
Cut: in addition to the removal of the faded flowers (advised not only for esthetic reasons, but because it supports the refloraison), it is in general advisable to carry out an annual size, before the starting of the vegetation (towards at the end of February in the northern hemisphere) for the rose trees tonics, after the flowering for the others, which will vary according to the species, the age and the state of the rose tree. It is especially necessary to remove old wood and to cut all the more short as it is about a small species, and to leave size to the climbing which if not could become again bushes.
Treatments: the white of the rose tree is treated by a pulverization of Soufre and the black spots by a pulverization of Bouillie of Bordeaux (one can in certain forms mix both in preventive medication). The Puceron S will be eaten by the ladybird S or will be driven out by a watering. The more particular problems concern the council of specialist.
Fertilization: rock salt, manure “special rose tree” or ashes of wood.
In Europe, the first cultivated rose trees were the gallic rose trees with the only white, pink or red flowers, and the rose trees burnet Spinolea of Pline Old the, rose trees of Scotland and rosa fœtida the bramble of Austria, a rose tree with yellow flowers. Then other botanical or cultivated species were brought back rest of the world, and initially, by the Croisés, the rose trees of Damas, Rosa damascena (it seems that it is a spontaneous hybrid of Rosa gallica X Rosa phœnicia ) and rosa damascena semperflorens (hybrid supposed Rosa gallica X moschata ). It is only at the end of the 18th century, that the importation of rose trees and the creation of new varieties still by spontaneous crossings took full sound rise (what is besides the case for many flowers of ornament), initially in France, then in England. The new species of rose trees came from China with the rose trees and for the hybrids of colonies like the island of the Meeting, with the rose trees Bourbon, or the Louisiana for the Noisette rose trees. All these hybrid rose trees of rose trees coming from China knew a very great popularity, because of the Chinese know-how which knew to produce scented rose trees, strongly tonics, even with quasi-continual flowering.
See also: Devastating and diseases of the rose trees
The cultivated rose trees have many enemies who tackle the various parts of the plant. It is mainly about cryptogamic diseases, of which most known are the disease of black spots, the white of the rose tree (oïdium) and rusts it, and various devastating insects such as the tenthrèdes, cochineals and plant louses.
Many other diseases, less frequent, are suitable for affect the rose trees: canker S, Pourridié S, Anthracnose, cast iron of sowings….
Among the ravageurs of the rose tree also appear of many insects, Tenthrède S whose caterpillars devour rolls up the sheets or them to shelter there, mégachile S, kinds of bees which take regular cuttings in the sheets to build their cabins, Cochenille S, cécidomyie S, etc the rose trees are also affected by Nématode S which attack the roots causing the formation of Wales, and by Acarien S present on the sheets.
A curiosity is the formation of Galle S filamentous, the “bédégars”, formed by a reaction of fabrics of the stem to the presence of Larve S of Cynips of the rose tree ( Diplolepis rosae ).
David Austin, the creator of the English pinks,
At the the United Kingdom, parts of the national collection of pinks are preserved by David Austin, Peter Beales and the Royal National Pink Society . Mottisfont Abbey guard a collection of old pinks of before 1900 and the collection of the botanical garden of the Université of Birmingham names “history of the European pink”.
In France, there exist many roseries (Liste of the roseries) and one can visit the seedbeds and the collections of the majority of the rosierists:
The culture of the rose trees is addressed to two distinct markets, that of the flower cut (pink on stems) for bouquets and floral decoration of interior, that of the seedlings of rose trees for the particular gardens and the public parks, sold out of containers or with naked roots according to the season.
The market of the cut flower, primarily European at the origin, tends to mondialiser. The principal surfaces of production are located in Europe (Netherlands, Italy, France), in North America (the United States), in Asia (Japan, China, Israel), in Latin America (Mexico, Colombia, Ecuador) and in Africa (Ethiopia, Kenya, Uganda, Zimbabwe, Morocco).
The markets of consumption are located mainly in Europe where the transactions concentrate mainly at the flower market ( Bloemenveiling ) of Aalsmeer (Holland-Septentrional) from where the pinks are reforwarded in all Europe, and in North America where the principal center of redistribution for the the United States is Miami. The production of the countries of Africa is exported mainly towards Europe and that of South America towards the United States. This market knows a strong expansion in Asia (China, India, South-East Asia).
This universalization raises various questions: work conditions in certain countries, evoked for example by Colombian film Maria full with grace , and in addition energy cost of transport in the plane.
In France, the trade of the rose trees and pinks concern:
The pink account for 52,7% of the purchases of cut flowers. The imports of pinks (cut flowers) are assembled to 111,7 million euros especially coming from the Netherlands (which treated some for 705,9 million euros with the markets of the dial)
The purchases of rose trees were assembled to France in 2003 to 64 million euros. France imports rose trees of the Netherlands, Denmark, of Spain, Hungary, Poland (where are installed German horticulturists) and exports some in Italy, Germany, Suisse, Ethiopia, Spain…
Finally one should not forget the licenses on creations and the partnerships like that between Meilland and Damn fool-Pyle Co with the the United States.
One meets also toponyms based on “pink” or “rosery”.
| Random links: | Zhou Yongkang | Ibères | Conservatory breeding | Series 1400 | Floyd hurricane |